Here are the 'fixes' (or changes) post Load Test #5. I've added a 200A final contactor so that I can use the voltage monitors to control if we allow power output from the power supply based on voltage being in the proper range. I can also now delay allowing voltage output until all the supplies have stabilized on initial startup.
I've also added fans and heat sinks for the final dual diodes.
Here's a short video demo of the smoke-test after these changes were made.
And now on to the full load test #6 next.